ABOUT THE TEST Why do some people have greater difficulty controlling their weight?? There are multiple factors that affect weight. Between these, genetics play an important role, being able to predispose some people to gain or lose weight and conditioning other factors that also influence, like diet, physical activity, metabolism, emotional and psychological factors, the dream, etc. In this line, the study of genetic and biochemical markers has been an important advance in obtaining specific information on how these can influence the ability to manage weight and that, unlike restrictive diets or other more aggressive methods, allows us to implement more targeted measures, effective and healthy.